DUAL TIPS - 1-2mm Brushes tip allows you easily laying down thick, thin, or varied lines in one stroke, works well for coloring books, signing, design, art project and hand lettering; 0.4 mm fine point tip is great for outlining, detail and drawing. These double-end markers are a must for your next masterpiece 10 UNIQUE COLORS - dual brush pens have10 vibrant colors and Color coded pen holder easier to choose right color every time. Also every pen comes with water-based, vibrant rich ink which will arouse your artistic creativity HIGH QUALITY - All brushes and fineliner work well with no skipping or ink flow issue. Especially, the nylon fiber brush tips would easily layer and mix different colors without worrying about smudges and blotches